There’s still widespread uncertainty about how exactly the executive order signed by President Donald Trump on Wednesday will change his policy of separating and detaining immigrant families. But one thing is clear: If the White House can’t deter or deport families arriving at the US-Mexico border, it wants to put them behind bars. According to Trump’s June 20 executive order, the Department of Homeland Security will detain families while adults are prosecuted for illegal entry or as they wait for asylum claims to be processed.